poly·​he·​dron | \ ˌpä-lē-ˈhē-drən How to pronounce polyhedron (audio) \
plural polyhedrons or polyhedra\ ˌpä-​lē-​ˈhē-​drə How to pronounce polyhedra (audio) \

Definition of polyhedron

: a solid formed by plane faces

Illustration of polyhedron

Illustration of polyhedron

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Other Words from polyhedron

polyhedral \ ˌpä-​lē-​ˈhē-​drəl How to pronounce polyhedral (audio) \ adjective

Examples of polyhedron in a Sentence

Recent Examples on the Web This polyhedron is a classic prism made from professional-grade optical crystal glass. Popular Science, "Prisms, crystal balls, and fractal filters for photographers," 23 Oct. 2019 The 20th-century mathematician Aleksandr Aleksandrov proved that for every two-dimensional polygon, there is one unique way of folding it to form a 3-D polyhedron. Quanta Magazine, "Test Your Mathematical Sculpting Skills," 5 Jan. 2017 And the circle packing proof tells you that there’s a polyhedron that has all its edges tangent to a sphere. Quanta Magazine, "In Search of God’s Perfect Proofs," 19 Mar. 2018 The printer cranks out up to 150 polyhedra each year – everything from models of protein crystallography to Mars' topography. Stacey Smith Lang, WIRED, "Skeleton Key," 1 Nov. 2001

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'polyhedron.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of polyhedron

1570, in the meaning defined above

History and Etymology for polyhedron

New Latin

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Time Traveler for polyhedron

Time Traveler

The first known use of polyhedron was in 1570

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Statistics for polyhedron

Last Updated

26 May 2020

Cite this Entry

“Polyhedron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polyhedron. Accessed 6 Jul. 2020.

More from Merriam-Webster on polyhedron

Britannica.com: Encyclopedia article about polyhedron

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